Finding the Fourth Proportional to 139,552.51, 209,397.93 and 55,310.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,552.51 : 209,397.93 = 55,310.81 : x
2. Step 2: Convert to fraction form
   139,552.51/209,397.93 = 55,310.81/x
3. Step 3: Cross multiply
   139,552.51x = 209,397.93 × 55,310.81
4. Step 4: Simplify right side
   139,552.51x = 11,581,968,921.83
5. Step 5: Solve for x
   x = 11,581,968,921.83/139,552.51
6. Step 6: Final answer
   x = 82,993.63